Syringe



Dec. 11', 1928.

H. K. BROWN SYRINGE Cil Patented' Dec. 11, 1928.

UNITED STATES PATENT -oFFlcn HENRY KINSEY BROWN, OF CICAGO, ILLINOIS, ASSIGNOR TO COOK LABORATORIES,

ING., OF CHICAGO, ILLINOIS, `A CORPORATION 0F DELAWARE.

srnmen.

Application'led November 23, 1921, Serial No. l517,318. Renewed January 20, 1928.

My invention relates to hypodermic syringes, and particularly to syringes employing medicament dispensing packages or cartridges. j

Among other objects, the invention aims to provide a syringe so constructed that its needle may be placed in operative position without contamination, and may be secured against longitudinal movement during an injection by simple but effective means. The invention also aims to combine a medicament package and holder therefor to provide an operative syringe which is superior in many particulars to syringes of the type disclosed in Cook Patent No. 1,231,497, June 26, 1917.

The invention may be understood by reference to one illustrative embodiment shown in the accompanying drawings, in which Figure 1 is a side elevation of a syringe embodying my invention.

Figure 2 is a longitudinal central sectionof the same, taken on dotted line 2, 2, Fig* ure 1, illustrating the needle exaggerated in diameter.

Figure 3 is a transverse section taken on dotted line 3, 3, Figure 2, looking in the direction of the arrows.

Figure 4 is a transverse section'taken on dotted line 4,4, Figure 2, looking in the direction of the arrows.

The syringe shown has a cylindrical barrel or casing 10 providing'a holder for a me dicament package or cartridge23, and has diametrically opposite longitudinal openings 11 to permit inspection of an inserted cartridge and its contents. Preferably, as

shown, the barrel is open at bo'th ends to permit insertion of a cartridge from either end. To close the barrel, removable barrel heads 14, 17 are provided, which are shown as secured by screw-threads 12 and 16 respectively.

The barrel head 14 vhas an internal conical seat forl the conical or conoidal enlargement 27 of the syringe needle 26 (Fig. 2), said enlargement preferably being of metal, and secured to the needle intermediate its ends, so that when the needle is seated, its inner point may pierce the end plug 24 of the cartridge to conduct the medicament therefrom.` One of the drawbacks of syringes as previously constructed has been the difficulty of preventing contaminationof the injection point either by touching with the hands, or by con# tact with the syringe, In order that an unskillful or hurried practitioner may position a needle without likelihood of contamination, the syringe head 14 is longitudinally slotted as at so as freely to admit the needle by a lateral movement until the needle is axially alined with its seat, whereupon it may be seated by a longitudinal movement through the axial' bore provided for it in head 14. Because of the arrangement of the parts, this is readily done without touching either end of the needle. In the operation of seating a needle, the needle enlargement 27 serves as a convenient handle; thus contamination of the needle shanlc i'sn easily avoided.

Inasmuch as it may be desirable to seat al needle without removing barrel head 14, the barrel 10 has a` longitudinal slot 13 which may be registered with slotw to provide a continuous slot extending from the end of the barrel to one of the sight openings 11,

Fig. 1. With such a construction, the needle is introduced laterally `as before, but its enlargement is passed through opening 11 until the needle is axially alined, whereupon it may be dropped into its seat Without liability of contaminating either end of the needle. f

The opposite barrel head 17 slidably carries the usual plunger 21'whose' enlarged end 20 pushes the slidable plug 25 of the cartridge in order toeject the medicament through the nedle. An extension 18 of the barrel head 17`is counterbored as at 19 to provide a seat for the plunger end 20. yThe usual finger-grips 15 are secured to head 17, while the outer end of the plungerhas the customary knob or handle 22.

The needle is shown held firmly in its seat by means of the cartridge 23, which 25 of rubber or the like. axial cavity whereby piercing of the plug is facilitated; Plug 25 is a solid cylindrical stopper which Vmay consist of united disks of rubber and cork, and is slidable throu'gn the tubes. The cartridge fits or-Ynearly fitsI the chamber provided within the barrel, as shown in Fig. 2, so that-when the plunger 1s moved to dispense the medicament, as during an injection, the lcartridge is .thrust by the reaction from the frictional resistance of plug' 25 against the needle enlargement 27 thereby holding the needle rmly. While the hydrostatic pressure created in the cartridge during an injection is considerable, no leakage occurs either around the 4needle or past plug 24. During an injection, the outer face of plug 24 is pressed against the needlev the cartridge may be inserted into the barrel as above described,

from eitherend, and after barrel head 17 is applied, the needle, seated in the loose barrel head 14, is passed through plug 24. In this operation, the screw threads by which head 14 is secured greatly facilitate the piercing because of their mechanical advantage, while the head itselfA serves as a convenient and non-contaminating needlehandling means. barrel, the needle may be inserted laterally, and the cartridge put the opposite end, and thrust either by the operators fingers or by the plunger against the needle point Vto effect the piercing.

Obviously the present restricted lto the particular embodiment thereof herein shown and descri I'do not claim the cartridge per seslierein shown and described, nor do I broadly claim a syringe embodying or comprising such cartridge or a cartridge having in its fore end the kind of pierceable plug herein shown and described, in conjunction with holding and operating means including a removable needle to pierce the recessed plug and a plunger to push lin the oppositeplulg, as such cartridge andsyringe comprlsing the same and such associated means are the subjects of prior inventions of Harvey S. Cook, and claimed by him in prior app ications now pending.

What I claim as new is? y 1. A hypodermic Syringe comprising, in combination, a barrel having an opening in its wall and a longitudinal slot extending from said opening to the end of the barrel; a screw-threaded barrel head having a seat and having a slot in its side, said slot being registerable with the barrel slot; a hypodermic needle `having an intermediate enlargement itting said seat; the parts being so constructed and arranged that the needle may be manually seated by lateral movement into in the barrel from falinementwith the seat, and then by longitudinal movement against said seat, without liability of contamination either by con- I the head 14 is on the` invention is not i axial opening to tact with the fingers.

2. vA hypodermic syringe comprising, in' combination, a cartridge holder constructed syringe or with the operators and arranged Vfor endwise insertion of the cartridge; a screw-threaded needle-securing head on one end of said holder having a longitudinal slot constructed and arranged Afor lateral insertion of the needle; and a double pointed needle having an intermedlate enlargement by which thehead may clamp it.

3. A hypodermic syringe comprisinor in combination, a.v cartridge holding bodybssub- Ystantially openat one end; anda needleseating barrel head screw-threadedron that end to close it andhold the needle in place; said barrel head provided with an axial opening and a longitudinal slot extending to said opening to permit lateral 'introduction of a needle into axial alinement with the seat.

4. A hypodermic -syringe comprising, 'in

combination, a hollow barrel having a longitudinal opening in its Wall; a barrel head secured to one end thereof and having Han axial'opening to provide a seat for vthe syringe needle; said barrel head also having a slot extending laterally to said seat and longitudinally between the barrel opening andthe end of the syringe; a hypodermic needle pointed at both ends and having an intermediate enlargement shaped to t said seat; said barrel-opening and slot permitting lateral insertion of the needle; a'removable barrel head. at the opposite end; a plunger slidable through the removable barrel head; and a medicament-dispensing package in- Sertible in the barrel and constructed and arranged to be contracted interiorly by the plunger; said package having a` perforatable 'end which is pierced by the inner end of the needle when thef syringe is ready for use, and which is in contact with the needle enlargement to hold the needle seated.

5. A hypodermic syringe comprising, in combination, a hollow barrel having a longitudinal opening in its wall; a barrel head secured to one end thereof and having an provide a seat for the syringe needle; saldbarrel head also having a slot extending laterally to said seat and longitudinally between the barrel opening and the end of the syringe; a hypodermic needle pointed at both ends and-having an intermediate enlargement shaped to fit said seat; said barrel opening and slot permityting lateral insertion of the needle without double pointed so that the inner end thereof may pierce the cartridge; means at one end of the cartridge holder for seating the needle by means of its enlargement; a cartridge fitting the holder and cooperating with the seating means for holdingthe needle in operative position; and means at the other end of the cartridge holder for reducing the in- `terior volume of the cartridge to expel its contents.

7. A hypodermic syringe comprising, in combination, a medicament cartridge; a cartridge holding barrel; a barrel head at one end thereof providing a substantially conical seat; and a hypodermic needle having an intermediate substantially conical enlargement fitting said seat; the cartridge holding the needle seated during use of the instrument.

8. A hypodermic syringe comprising, in combination, a medicament cartridge having a pierceable end and a plug movable-therethrough to eject the medicament; a cartridge holding barrel; a barrel head at one end thereof providing a seat; and a needle having an intermediate enlargement fitting said seat; the cartridge being pierced by the needle and engaging the needle enlargement to` hold the needle seated during use of the instrument.

9. A hypodermic syringe comprising, in combination, a barrel having a chamber t0 receive a cartridge; a plunger rod at one end of the barrel; the barrel having a seat at the other end thereof opening into the cartridge chamber; a needle having an intermediate enlargement fitting the seat; and a cartridge fitting said chamber to hold the -needle seated. I

10. A hypodermic syringe comprising, in combination, a cartridge holding barrel; a plunger rod at one end of the barrel; the other endof the barrel having a seat opening into the cartridge chamber; a vneedle having an intermediate enlargement fitting the seat; and a cartridge comprising a tube sealed at its ends by two plugs, one deslgned to be moved through the tube by the plunger rod, the other constructed and arranged to be easily pierced by the needle when seated; said pierceable plug being in contact with theneedle enlargement when the parts are ready for use, thereby holding the needle in its seat. G

11. A hypodermic syringe comprising, 1n combination, a barrel provided at one end with a substantially conical needle seat; and a needle having an intermediate enlargement shaped to fit ysaid seat; saidbarrel slotted so that the needle may be seated by lateral movement thereof into axial alignment with its seat, without necessary contact with any portion Vof the syringe.

12. In a cartridge syringe, a cartridgeholding barrel having a longitudinally slotted fore end with a seat therein for a needle enlargementf and a separate doublepointed needle having an intermediate enlargement, said needle adapted to be positioned in said holder by inserting the needle laterally and then moving it longitudinally to lodge its enlargement in said seat, the holder having a lateral opening continuous with the slot in its fore end through which vslot vand opening the needle may be passed to insert it laterally in the holder.

13. In a cartridge syringe, a cartridgeholder, a double-pointed needle having an intermediate enlargement, said holder having a seatfor said enlargement, the ,parts constructed and arranged so that the inner end of the needle is adapted to pierce the fore end of a cartridge in said holder and the cartridge cooperates with said enlargement to hold the needle seated.

In Witness whereof I have hereunto set my hand this 31st day of October, 1921. A

HENRY KINSEYY BROWN. 

